From bcddee29b0b87af3aeda953840f97b356b24dc5e Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 16 Apr 2014 09:42:23 -0400 Subject: [PATCH] drm/radeon/ci: make sure mc ucode is loaded before checking the size Avoid a possible segfault. Noticed-by: Dan Carpenter Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- drivers/gpu/drm/radeon/cik.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c index 7e43045..199eb19 100644 --- a/drivers/gpu/drm/radeon/cik.c +++ b/drivers/gpu/drm/radeon/cik.c @@ -1705,11 +1705,13 @@ int ci_mc_load_microcode(struct radeon_device *rdev) const __be32 *fw_data; u32 running, blackout = 0; u32 *io_mc_regs; - int i, regs_size, ucode_size = rdev->mc_fw->size / 4; + int i, regs_size, ucode_size; if (!rdev->mc_fw) return -EINVAL; + ucode_size = rdev->mc_fw->size / 4; + switch (rdev->family) { case CHIP_BONAIRE: io_mc_regs = (u32 *)&bonaire_io_mc_regs; -- 2.7.4